Cosmetic containing benzotriazole diorganopolysiloxanes

Abstract

The cosmetic use is described, in particular for use as a UV filter, of benzotriazole diorganopolysiloxanes having either formula: <IMAGE> (1) where R is C1-C10 alkyl, phenyl or 3,3,3-trifluoropropyl, B is R or A, r=0-200, s=0-50, or formulas: <IMAGE> (2) where u=1-20, t=0-20 and t+u>/=3. A and/or B represent a benzotriazole C3-C12 alkylene which may be substituted.

We claim: 
     
       1. A cosmetic composition which comprises at least one cosmetically acceptable solvent, at least one cosmetic additive selected from thickeners, softeners, moisturizers, surfactants, preservatives, anti-foaming agents, perfumes, oils, waxes, lanolin, propellants, dyes and pigments, and an effective quantity for protecting the skin and hair against UV radiation in the range of 280 to 360 nm wavelengths of at least one benzotriazole diorganopolysiloxane having the formula: ##STR15## wherein: R may be the same for each occurrence or different and is selected from C 1  -C 10  alkyl radicals, phenyl radicals and 3,3,3-trifluoropropyl radicals, at least 80% by number of the R radicals being methyl radicals, B may be the same for each occurrence or different and is selected from radicals R and A,   r is a number between 0 and 200 inclusive,   s is a number between 0 and 50 inclusive and if s is 0 at least one of the two B radicals is A; or the formula: ##STR16## wherein: R has the meaning defined for formula (1),     u is a number between 1 and 20 inclusive,   t is a number between 0 and 20 inclusive,   t+u is greater than or equal to 3;   and wherein in both formulae the symbol A denotes a radical having the formula: ##STR17##  wherein: X represents a hydrogen atom or a C 1  -C 4  alkyl radical, p represents a whole number between 1 and 10, and   Y represents a hydrogen atom or a C 1  -C 8  alkyl radical.     
     
     
       2. A cosmetic composition according to claim 1 which comprises a random or block benzotriazole diorganopolysiloxane having at least one of the following features: R is methyl, B is methyl, r is between 5 and 20 inclusive, s is between 2 and 15 inclusive, t+u is between 3 and 10 inclusive, X is H or methyl, p=1 and Y is methyl. 
     
     
       3. A cosmetic composition according to claim 1 which comprises a polydimethylsiloxane grafted with 3-alkyl-2-OH-5-methylphenylbenzotriazole having formula (1) wherein R and B represent a methyl group, r=5, s=5. 
     
     
       4. A cosmetic composition according to claim 1 which comprises a polydimethylsiloxane grafted with 3-alkyl-2-OH-5-methylphenylbenzotriazole having formula (1) wherein R and B represent a methyl group, r=8, and s=9. 
     
     
       5. A cosmetic composition according to claim 1 which additionally contains a cosmetically acceptable solvent selected from water, oils, waxes, low monoalcohols and polyols, C 12  -C 15  alcohol benzoates, and mixtures thereof. 
     
     
       6. A cosmetic composition according to claim 1 which is in the form of an oily, alcoholic or oleoalcoholic lotion, emulsion, oleoalcoholic, alcoholic or hydroalcoholic gel, solid stick, spray or aerosol. 
     
     
       7. A cosmetic composition according to claim 1 which constitutes a protective composition for the human skin and contains 0.25 to 3% by weight of diorganopolysiloxane having formula (1) or (2). 
     
     
       8. A cosmetic composition according to claim 1 in the form of a sun screen which contains 0.5 to 15% by weight of diorganopolysiloxane having formula (1) or (2). 
     
     
       9. A sun screening cosmetic composition according to claim 8 which further contains a filtering agent for UV-B and/or UV-A radiation. 
     
     
       10. A cosmetic composition according to claim 1 for application to the hair which is in the form of a shampoo, lotion, rinsing gel or emulsion, for application before or after shampooing, before or after dyeing or bleaching, before or after a perm, as a styling or treatment lotion or gel, a brushing or setting lotion or gel, hair spray or hair lacquer and, comprises 0.25 to 5% by weight of diorganopolysiloxane having formula (1) or (2). 
     
     
       11. A cosmetic composition according to claim 1 in the form of coloured or non-coloured cosmetic composition which is the form of a hairdressing composition, a cosmetic or a product for caring or treating the skin, comprising 0.25 to 3% by weight of diorganopolysiloxane having formula (1) or (2). 
     
     
       12. A process for the cosmetic treatment of the skin or the hair which consists in applying to the skin or the hair a cosmetic composition containing an effective amount to provide protection against UV radiation in the range of 280 to 360 nm wavelengths of a benzotriazole diorganopolysiloxane having the formula: ##STR18##  wherein: R may be the same for each occurrence or different and is selected from C 1  -C 10  alkyl radicals, phenyl radicals and 3,3,3-trifluoropropyl radicals, at least 80% by number of the R radicals being methyl radicals, B may be the same for each occurrence or different and is selected from radicals R and A,   r is a number between 0 and 200 inclusive,   s is a number between 0 and 50 inclusive, and if s is 0, at least one of the two B radicals is A;     or having the formula: ##STR19##  wherein: R has the meaning defined for formula (1), u is a number between 1 and 20 inclusive,   t is a number between 0 and 20 inclusive,   t+u is greater than or equal to 3;   and wherein both formulae the symbol A denotes a radical having the formula: ##STR20##  wherein: X represents a hydrogen atom or a C 1  -C 4  alkyl radical, p represents a whole number between 1 and 10,   Y represents a hydrogen atom or a C 1  -C 8  alkyl radical.       
     
     
       13. A method of protecting a cosmetic composition against ultraviolet radiation which consists in incorporating into said composition an effective quantity to provide UV protection in the range of 280 to 360 nm wavelengths of a benzotriazole diorganopolysiloxane having the formula: ##STR21## wherein: R may be the same for each occurrence or different and is selected from C 1  -C 10  radicals, phenyl radicals and 3,3,3-trifluoropropyl radicals, at least 80% by number of the R radicals being methyl radicals, B may be the same for each occurrence or different and is selected from radicals R and A,   r is a number between 0 and 200 inclusive,   s is a number between 0 and 50 inclusive, and if s is 0, at least one of the two B radicals is A; or having the formula: ##STR22## wherein: R has the meaning defined for formula (1),     u is a number between 1 and 20 inclusive,   t is a number between 0 and 20 inclusive,   t+u is greater than or equal to 3;   and wherein both formulae the symbol A denotes a radical having the formula: ##STR23##  wherein: X represents a hydrogen atom or a C 1  -C 4  alkyl radical, p represents a whole number between 1 and 10,   Y represents a hydrogen atom or a C 1  -C 8  alkyl radical.